Mai, H., J. .-L. Maeghtb, V. H. Bui, and C. Valentin. “Assessment of Heavy Metal Concentrations and Its Potential Eco-Toxic Effects in Soils and Sediments in Dong Cao Catchment, Northern Vietnam”. Vietnam Journal of Earth Sciences, vol. 42, no. 2, May 2020, pp. 187-04, doi:10.15625/0866-7187/42/2/15046.